green



(No Model.) 3 Sheets-Sheet 2.

0. W. GREEN.

STONE SAW GANG AND SAND FEED COMBINED. No. 371,313. a Patented Oct. 11,1887.

ITIIIIIIE ZjIEEl-lim II INVNTOH M, 12w M ATTORNEYS N PETERS.Fhuhrljlhogmphnr. Washinghm. ac.

(No Model.) 7 3 Sheets-Sheet 3.

0. W. GREEN. STONE SAW GANG AND SAND FEED COMBINED.

No. 371,318. Patented Oct. 11, 1887..

WITNESSES: gvlzmon ATTORNEYS N. PETERS PbmmLiIhngnpher, Washington, Dvc.

UNITED STATES PATENT OFFICE.

CYREL IVORINGTON GREEN, OF WEST RU'ILAND, VERMONT.

STONE-SAW GANG AND SAND-FEED COMBINED.

SPECIFICATION forming part of Letters Patent No. 371,313, dated October11, 1887. Application filed April 11, 1887. Serial No. 234,348. (Nomodel.)

To all whom it may concern:

Be it known that I, OYREL WORINGTON GREEN, of \Vest Rutland, in thecounty of Butland, in the State of Vermont, have invented new and usefulImprovements in Stone-Saw Gang and SandFeed Combined, of which thefollowing, taken in connection with the accompanying drawings, is afull, clear, and exact description.

This invention consists in a novel organization of a machine designedfor sawing stone and to automatically feed the saws with water and sandduring the operation of said saws, and which machine is simple andcompact in construction, requiring less space than other machines ofthis class, and receives motion through the medium of a system of leverswhich materially facilitates the operation of the machine, all ashereinafter fully described, and specifically set forth in the claims.

In the accompanying drawings, Figure l is a perspective view of astone-saw gang and sand-feed combined embodying my invention. Fig. 2 isa vertical transverse section of the same, taken through the center ofthe automatic sandfeed. Fig. 3 is a vertical longitudinal section takenon lines a: 00, 'Fig. 2. Fig. 4 is a top plan View of the mechanismwhich regulates the feed of the saws in their operation. Figs. 5 and 6are detail views of the anti-friction bearings of the levers andeccentric, respectively; and Fig. 7 is a detached side view of thedevices by which the pawls of the saw-gang feed are thrown in and out ofgear.

Similar letters of reference indicate corresponding parts.

A represents the main supporting-frame of the machine, the corner-postsA A of which frame I provide with vertical guide-grooves o o, in whichare fitted to slide vertically the fulcrum-bars B B, and to thesefulcrum-bars are pivotally connected levers O G G O, to the lower endsof which is connected the sawframe D, to which latter the saws g g aresecured in any suitable and well-known manner. The two levers at eachend of the machine are inclined with their upper ends to ward eachother, and a single bar, H, is connected at opposite ends between theupper ends of the respective setsof levers.

1 represents the eccentric, mounted on a driving-shaft, U, and from saideccentric is extended a rod, I, the extremity of which is pivotallyconnected to the connecting-bar H, hereinbefore referred to. Saideccentric, when in motion, imparts reciprocating motion to the bar H,and by that means oscillatory motion is transmitted to the levers O C (lC, and the motion of the latter imparts the requisite motion to thesaw-frame l).

The lowering and raising of the sawframe I accomplish by the followingfeed mechanism: Across the top of the frame A, I place a shaft, a,journaled in suitable boxes on said frame, and to' the said shaft Irigidly secure a gear-wheel, b, and drums c c, and to the upper part ofopposite ends of the frame A, I pivot sheaves (l .61. Over these sheavesrun wire ropes w w, which are connected at one end to the aforesaiddrums and at the opposite end to the fulcrumbars B B, the ropes at eachside of the frame being wound on the drum in opposite directions, sothat by rotating said drums the two ropes running therefrom are eitherpaidout or wound up in unison, ac cording to the direction in which thedrum is turned. The fulcrunrbars, being suspended by said ropes, arethus lowered and raised by the aforesaid movement of the ropes. On thetop of the frame A is mounted a sliding bar, 3, to which are connectedtwo jaws, n n,whicl1 project laterally therefrom, so as to beencountered by one of the levers 0 during the oscillation thereof, andthus the aforesaid sliding bar receives reciprocating motion during theoscillation of the aforesaid lever. To the sliding bar is pivotallyconnected a pawl, Z, which is adapted to engage the gear I), and thusrotates said wheel in a direction which causes the ropes w w to be woundup on the drums, and consequently raises the saw-frame D. Parallel withthe shaft a is a counter-shaft, e, journaled in suitable bearingssecured to the frame A. To this counter-shaft is secured a pinion, f,which meshes in the gear-wheel b, as shown in Fig. 4. of the drawings.To the counter-shaft is also rigidly secured aratchetwheel, h, withwhich is adapted to engage a pawl, Z, connected to the sliding bar I,hereinbefore referred to. By throwing the pawlZ out of engagement withthe gear I) and the pawl Zinto engagement with the ratchet-wheel h whenthe machine is in operation the shaft and thus the fulcrum-bars B B areallowed to descend,together with the levers O O C 0, connected thereto,and saw-frame hung on said levers. The pawls Z Z may be shifted by meansof suitable levers, Z and l, as shown in Fig. 7 of the drawings.

In order to maintain the aforesaid shafts dormant in their positionswhile the pawls are out of engagement, I employ a suitable brake, whichI have represented in the annexed drawings in the form of a wire rope,j, attached at one end to a friction-band,j, surrounding the drum j onthe counter-shaft c, and connected at the opposite end to a winch, T, bymeans of which the said wire rope can be wound up, so as to exertsufficient friction on the drum of the counter shaft to restrain therotation thereof, as aforesaid. A dog, 1, pivoted on the frame A andengaging a ratchet, 2, on the winch, serves to maintain the wire rope jat the requisite tension.

Inasmuch as it is preferred to arrange the main driving-shaft U at anelevation above the connecting bar H and at the proper distance from theend thereof, it is obvious that during the descent of the saw frame withits levers O O O O and connectingbar H the angle between theeccentric-rod I and connecting-bar H is constantly changed, and saidlatter bar is gradually drawn toward the side at which the maindriving-shaft is located, and consequently the motion of theconnecting-bar with the levers O O (J 0 connected thereto is graduallyreduced.

In order to reduce the motion of the feed- 7 wheels I) and Itcorrespondingly, I attach to the lever O with which the jaws of thesliding bar I engage cheek-pieces n n, which are tapered from theirlower ends upward.

The aforesaid feed I render adjustable by connecting the jaws n nadjustably in their positions on the bar 1', which may be effected byproviding said bar with longitudinal slots 3 for the reception of thebolts by which the jaws are clamped on the bar, as best seen in Fig. 3of the drawings.

Inasmuch as machines of' this class areexposed to more or less grit, itis necessary to guard against friction in the bearings of the machine asmuch as possible, and in order to meet this requirement I employanti-friction bearings N N around the eccentric I and at all of thepivotal connections of the levers O O O C with the bar H, fulcrum-bars BB, and saw-frame D, and also in the connection of the pitrnen I with thebar H. These anti-friction bearings consist each of a hub, 19, securedto one of the aforesaid parts, and an annular plate, .9, secured to theadjacent part, and balls or rollers 15 t, interposed between said huband plate, as illustrated in Figs. 5 and 6 of the drawings.

In connection with the described machine I employ an automaticsand-feed, consisting of a hollow rotary shaft, F, mounted horizontallyin suitable bearings secured to the frame A, and having one end open andover the central portion of the saw-frame D. The opposite end of saidshaft is closed and has secured to it a hub, F, and this hub is providedwith radial channels is, communicating with the interior of the shaft F.In the said channels are firmly secured suitable dippers, G G,preferably of the form of pipes curved similar to the arms of theso-called Persian wheel. The free ends of said pipes terminate nearlyconcentric with the axis of the shaft F and pass through a trough orreservoir, L, in which are deposited sand and water. During the rotationof the shaft F the dippers or pipes G G collect sand and water from thereservoir L and conduct saidsand and water into the pipe F, whichdeposits the same on the top of the stone operated on by the saws.

The described sand-feed is operated synchronously with the operation ofthe saws by means of a driving-belt, at, running on the hub of the shaftF and on a pulley, m, secured to the driving-shaft U.

I do not limit myself specifically to the employment of the curved pipesG G, as it is obvious that dippers of various forms can be made to movewith the shaft and conduct sand and water to the same; neither do Ilimit myself to the use of the eccentric I, inasmuch as a crank willanswer the same purpose.

Having described my invention,what I claim as new, and desire to secureby Letters Patent, is-

1. In combination with the main frame and the reciprocating saw-frameand water and sand reservoir, a hollow rotary shaft arrangedhorizontally and having one end open and" over the saws, a hollow hubsecured to the opposite end ofsaid shaft, and hollow curved armsprojecting from the hub and communicating with the interior of thehollow shaft, and having their free ends open and arranged to passthrough the aforesaid reservoir, substantially as described and shown.

2. In combination with the main frame A, provided with vertical guides,and the fulcrums B B, sliding on said guides, the levers G O, inclinedwith their upper ends toward each other, the single bar H, connected atopposite ends to the upper ends of the two sets of levers, the pitman I,connected to the bar H, and the saw-frame D, hung on the lower ends ofsaid levers, substantially as described and shown.

3. The combination of the main frame A, provided with vertical guides AA, the fulcrums B B, sliding on said guides, the levers O 0, connectedto said fulcrums,the saw-frame D,hung on saidlevers, the shaft a,pivoted on the main frame, the gear-wheel b and drums c c,secured tosaid shaft,sheaves d d d d, pivoted t0 the main frame, ropes passingover the sheaves and connected at opposite ends to the drums andfulcrums, the counter-shaft e, the pinion f and ratchet-wl1eel h,bothattached to said counter-shaft, the sliding bar 95, actuated by theaforesaid levers,and the pawls Z Z,

connected to said sliding bar and adapted U ing bar i, jaws n n,adjustably connected to the said bar, and pawlsll, connected to thesliding bar, substantially as described and shown.

5. In combination with the feed-gears Z) and h, sliding bar 2', providedwith jaws n n and pawlsl Z, vertically-movable fulcruins B B, and thelevers O O G 0, connected to said fulcrnms, the cheek-pieces 0 0,secured to one of the levers between the jaws n n and tapered from theirlower to the upper ends, substantially as described and shown, for thepurpose set forth.

In testimony whereof I have hereunto signed my name and affixed my seal,in the presence of two attesting witnesses, at \Vest Rutland, 0 in thecounty of Rutland, in the State of Vermont, this 5th day of April, 1887.

CYREL WORINGTON GREEN. [n s] W'itnesses:

A. A. KIDDEs, D. M. SOHELL.

